Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/BlackboardDataFacet.java @ 2024:2bb160b2768e
New facet, will ease converting other facets to be able to contribute to area computations.
flys-artifacts/trunk@3481 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 20 Dec 2011 09:00:51 +0000 |
parents | |
children | bb0dede9294f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/BlackboardDataFacet.java Tue Dec 20 09:00:51 2011 +0000 @@ -0,0 +1,55 @@ +package de.intevation.flys.artifacts.model; + +import java.util.ArrayList; +import java.util.List; + +import de.intevation.artifacts.Artifact; +import de.intevation.artifacts.CallContext; + +import de.intevation.artifactdatabase.state.DefaultFacet; + + +/** + * Facet that writes artifact-uui and facet index on the blackboard, + * delivers data if asked so. + */ +public class BlackboardDataFacet extends DefaultFacet { + + public BlackboardDataFacet() {} + + /** Do not instantiate a BlackboardDataFacet, subclass it instead. */ + public BlackboardDataFacet(int idx, String name, String description) { + super(idx, name, description); + } + + + /** Hey, We can ArtifactUUID+FacetIndex (i.e. getData)! */ + public List getDataProviderKeys(Artifact art) { + List list = new ArrayList(); + list.add(art.identifier() + getIndex()); + return list; + } + + + /** + * Can provide whatever getData returns. + * @param key will respond on uuid+index + * @param param ignored + * @param context ignored + * @return whatever getData delivers. + */ + public Object provideBlackboardData(Artifact artifact, + Object key, + Object param, + CallContext context + ) { + if (key.equals(artifact.identifier() + getIndex())) { + return getData(artifact, context); + } + else { + return null; + } + } + +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :